Andre Drummond has been impressed by Boban Marjanovic during their informal pickup matchups this summer.

"I was telling the guys after we got done playing our first pickup game, that might have been the first (time) I've been really frustrated playing against someone," Drummond said Monday, appearing at the Jalen Rose Leadership Academy celebrity golf outing.

"It's so hard to score on him."

The Detroit Pistons signed Marjanovic to a three-year, $21 million deal this offseason.

"Boban is a hell of a player," Drummond said. "He's been a huge addition for us, and he's definitely going to be a big help for us throughout this season as well."

Drummond was asked if Marjanovic is better than he expected.

"Absolutely," replied Drummond.

Trey Freeman has agreed to a partially guaranteed deal with the Detroit Pistons.

Freeman went undrafted out of Old Dominion in 2016.

Freeman was a two-time First-team All-Conference USA selection.

Playing for the Houston Rockets in Summer League, Freeman averaged 5.2 points, 3.2 rebounds and 2.4 assists in 18.4 minutes per game.